Jig or form for commutator assembling.



PATENTED JULY 2:3,1907.

H. E. GENOR. JIG 0R FORM-FOR GOMMUTATOR ASSEMBLING.

APPLICATION FILED FEB. 20, 1906.

WITNESSES ATTORNEY HENRY E. GENOR, OF WILKINSBURG,

ELECTRIC PENNSYLVANIA, & MANUFACTURING COMPANY,

ASSIGNOR TO WESTINGHOUSE A CORPORATION OF PENNSYLVANIA.

J'IG OR FORM FOR COMMU'IATQR ASSEMBLING.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed February 20, 1906. Serial No. 302,186;

To all whom it may concern:

Be it known that I, HENRY E. GENOR, a citizen of the United States, anda resident of Wilkinsburg, in the county'of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Jigs orForms for Commutator Assembling, of which the following is aspecification.

My invention relates to jigs, forms or similar devices upon whichcommutator segments for dynamoelectric machines may be assembled and ithas for its object to provide a device of the aforesaid class, whichshall be simple and durable in construction and which shall materiallyfacilitate the assembling of the commutator segments and obviate thenecessity of subsequently machining the interior surface of thecommutator cylinder.

Commutator cylinders for dynamo-electric machines, which comprise aplurality of similar bars or segments separated by strips or layers ofsuitable insulating material, have usually been constructed byassembling the bars within a ring-shaped clamp by means of which theassembled bars were held in position while the inner cylindrical surfaceand the usual V-shaped grooves therein were being machined. After themachining process, the commutator bars were fitted upon an internalbushing and held in position by V- shaped rings which engaged thecomplementary grooves therein.

Commutator bars of moderate thickness may be so formed by the punchingprocess, as now perfected, that a commutator cylinder composed of suchbars may be utilized without machining its inner surface, provided theseveral bars can be held in the same relative position to the bushingduring the assembling process. If the bars are assembled directly uponthe bushing, it is necessary to force the last bar of the set intoposition, and, consequently, the commutator is liable to run untrue whenthe bushing is mounted upon a rotating shaft.

According to my present invention, I provide a ring of somewhat largerradius than the V-shaped flange on the bushing, upon which the severalbars may rest until the required number are set up around the bushingwhen the bars are drawn together and into position on the bushing bymeans of the usual V-shaped ring.

My invention is illustrated in the accompanying drawings in which Figure.1 is a view, partially in side elevation and partially in section andFig. 2 is a plan view of a jig constructed in accordance therewith. Fig.3 is a detail view of the clamping device shown in Figs. 1 and 2.

Referring to the drawings, the jig illustrated therein comprises a baseplate 1 which is provided with a cenl l l s trally located, longitudinalslot 2, a detachable, cylindrical member 3, the lower end of which isprovided with a projecting key 4 which is adapted to engage the slot 2,a ring 5, the upper surface of which is provided with a plurality ofradial projections 6, corresponding in number to the commutator bars tobe assembled, and which is mounted upon the base plate I concentric withthe cylindrical member 3. The cylindrical member 3 is of such size as tocorrespond to the shaft upon which the commutator bushing will bemounted so that the commutator bushing 7 may be fitted closely thereto.The ring 5 is of sufficient size to avoid the bushing 7 which may restupon the base plate 1.

In assembling a commutator after the bushing 7 is in position on thebase plate 1, a single commutator bar is first held in an uprightposit-ion, with its lower end resting upon one of the projections 6 onthe upper surface of the ring 5, by means of the arm 8 of an angle piece9 which is pivotally supported upon a pin 10 in the upper end of avertically adjustable upright member 11, that is attached to an angleblock 12 by a binding screw 13. The angle piece 9 is so mounted upon thepin 10 in a slot 14 in the upper extremity of the upright member 11,that a downward pressure maybe applied to a commutator bar locatedbeneath the arm 8 by means of a set screw 1 f, that is screw-threadedinto a latch bar 15. The bar 15 is pivotally mounted upon a screw 16 andmay be fastened in position across the slot 14 by it and by a screw 17with which it engages by means of a notch 18.

The radial projections 6 on the upper surface of the ring 5 form aplurality of intervening radial grooves or recesses, and strips ofinsulating material of suitable shape, that are assembled betweenadjacent commutator bars, extend into the recesses so formed. In thisway, the insulating material extends somewhat beyond the commutator barsso that complete insulation of the adjacent bars is insured.

In using the apparatus above described, a single commutator bar isaccurately adjusted upon the ring 5 be neath the arm 8 and is thenclamped in position by manipulating the screw 14. The additional barsand the alternate insulating strips are then placed in position aroundthe bushing until the cylinder is completed.

Since the inner diameter of the ring 5 is considerably greater than theoutside diameter of the bushing 7 and since its height is such as toprevent the bars from moving into close engagement with the V-shapedflange on the bushing, all the bars may be assembled without crowding,after which a V-shaped ring may be forced into engagement with the upperannular groove in the cylinder, and, as this ring is forced down, thebars will be drawn radially inward and the bushing '7 will be drawn upuntil its V-shaped flange fits closely into the lower annular groove inthe cylinder and the cylinder is clamped securely upon the bushing withits bars uniformly spaced and subjected to the same stresses.

I claim as my invention:

1. A jig for assembling commutator segments, comprising a base platehaving a projection which is adapted to lit within a commutator bushing,a ring mounted eoncentrically therewith on said base and having aplurality of radial slots in its upper surface, and means for supportinga single bar in an upright position on the upper surl'ace of the ring.

2,. A jig or form for assembling commutator segments that comprises acylindrical member which is adapted to engage the interior of acommutator bushing, a ring which is concentric with and of larger radiusthan the outer radius of the bushing and the upper surface 01' which isprovided with radial projections corresponding to the number ofcommutator bars, and means for supporting a single bar in an uprightposition on one of said radial projections.

33. A jig or term for assembling commutator segments that comprises aplane base, means for fastening a commutator bushing with its axisperpendicular thereto, a ring of materially larger radius than thebushing and eoncentric therewith, and means for fastening a single baron the upper surface of the ring in a radial plane.

4. A jig for assembling commutator segments that comprises a base platehaving a projection which is adapted to fit the interior of a commutatorbushing, a ring mounted concentrically therewith on said base and havinga plurality of radial recesses in its upper surface, and means forsupporting a single bar in an upright position on the upper surface ofthe ring that comprises an angle block, an adjustable upright attachedthereto having a slot near its upper e tremity, an angle piece which ispivotally mounted in said slot and one arm of which may project radiallyover said ring and means for causing said arm to exert a downwardpressure.

5. A jig or form for assembling commutator segments that comprises acylindrical member which is adapted to engage the interior of thecommutator bushing, a ring which is concentric with, and of largerradius than the outer radius of the bushing and the upper surface ofwhich is provided with radial projections corresponding in number to thecommutator bars and means for supporting a single bar in an uprightposition on one of said radial projections that comprises an angleblock, an adjustable upright attached thereto having a slot near itsupper extremity, an angle piece which is pivotally mounted in said slotand one arm of which may project radially over said ring and means forcausing said arm to exert a downward pre sure.

6. A jig or form for assembling commutator segments that comprises aplane base, means for fastening a commutator bushing with its axisperpendicular thereto, a ring of materially larger radius than thebushing and con centric therewith, and means for fastening a single baron the upper surface of the ring in a radial plane that c0m prises anangle block, an adjustable upright attached thereto having a slot nearits upper extremity, an angle piece which is pivotally mounted in saidslot and one arm of which may project radially over said ring and meansfor causing said arm to exert a downward pressure.

7. A jig or form for assembling commutator segments for dynamo-electricmachines that comprises a plane base having a centrally locatedlongitudinal slot, a detachable cylindrical member which is iittedinside a commutator bushing and has end projections which engage saidslot, a ring member which is mounted on said base concentric with saidcylindrical member and is provided with a pinrality of radial proje-tions on its upper surface corresponding in number to the commutatorbars.

A or form for assembling commutator segments for dynamo-electricmachines that comprises a plane base having a centrally located lonitudinal slot, a detachable cylindrical member which is fitted inside acommutator bushing and has end projections which engage said slot, aring member which is mounted on said base concentric with saidcylindrical member and is provided with a pin rality of radialprojections 011 its upper surface cor responding in number to thecommutator bars, an angle block, an adjustable upright member attached[hereto having a slot near its upper extremity, an angle piece pivotallymounted in said slot and one arm of which may project radially over saidring and means for causing said arm to exert a downward pressure.

9. A jig or form for assembling commutator segments comprising a basehaving a projection to receive a commutator bushing, a ring oi greaterdiameter than the bushing that surrounds it and rests upon the base. and:ul iust able means for holding a segment. upon the ring.

10. A jig or form for assembling commutator segments comprising a basehaving a cylindrical ])l'O cliou and a ring between which is space for abushing and means [or clamping a segment in proper radial position 011the ring.

114 A jig or form for assembling commutator segments comprising a basehaving a cylindrical member to receive a commutator bushing, a ringhaving radial ribs upon its upper surface and 01' such diameter that itmay surround the bushing and rest upon the base, and means for clampinga single commutator segment against one of said radial ribs in operativerelation to the bushing.

In testimony whereof, I have hereunto subscribed my name this 16th dayof February, 1906.

HENRY E. GENOR.

Witnesses R. .T. DEARBOIIN, BIRNEY Ilrxus.

